There are calm cockatoos but, in my personal experience (I have one and had another one in the past), they are sad, sad birds. Linus is pretty calm. He hardly ever screams and, when he does, is not even that loud, he never bites, never goes after your feet, etc but he is also completely plucked and a scaredy cat of a bird that needs months and months to get used to any new thing. I would much rather had a pain in the neck Freddy than a sad Linus...

We have a male cape parrot at the rescue. He is very smart, is an escape artist, and is very friendly to people and seems tolerant of other birds when they do something like land on his cage. He's also a good flyer. He manages to fly around in a small room, avoiding (disabled) ceiling fans and such.

I literally cut him out of a filthy cage. He had no water. I don't know how he had survived

Of all the birds I took out of cages that day, the cape was the only one who came toward me, rather than running away.